Question

How can i solve this question ?

Answer 1

The parallel lines have created similar triangles. So, the following is true:

`(20)/(30) = (AC)/(AE) = (2)/(3)`
this means that
`(CE)/(AE) = (1)/(3)`

Because those sides are shared we can create the following proportion:

`(1)/(3) = (4)/(h)`

Cross - multiply and we get h = 12